Which solution will have the highest concentration of Na" ions? A) Na,CO3 В) NaHCO, C) NaCl D) NaHSO, According to the Brønsted-Lowry definition, an acid is a substance that A) increases the hydrogen ion concentration in water. B) can react with water to form Hions. C) can accept an electron pair to form a covalent bond. D) can donate a proton to a base.

In aqueous solution the [H'] is 1.4 x 104 M. The [OH] in the same solution is A) 1.4 x 10-² M B) 1.4 x 10-7 M C) 1.0 × 10-7 M D) 7.1 x 10-1l M In aqueous solution the [OH-] is 3.0 x 106 M. The [H*] in the same solution is A) 1.0 x 10-" M B) 3.3 x 10-° M C) 3.0 x 10-6 M D) 3.0 x 10% M If an aluminum nitrate solution is added to a sodium fluoride solution the following equilibrium will be reached: Al³*(aq) + 6 F-(aq)=AIF6 (aq). For this equilibrium, K = 5.0 x 1023. Choose the correct equilibrium constant and the correct direction favored at equilibrium. A) K = [AIF,"] [A1³* ][F] ' 3+ ; reverse B) [AIF] K = forward [A1* ]F ]' [AIF,] [A1** ][FT C) K = reverse IDENAL D) [AIF,] K = [AI** ][F** ; forward

Calculate [OH -] and pH for each of the following solutions.(a) 0.0068 M NaOH [OH-] =  M pH =  (b) 0.0218 g of NaOH in 460.0 mL of solution [OH -] =  M pH =  (c) 83.6 mL of 0.00124 M Sr(OH)2 diluted to 400 mL [OH -] =  M pH =  (d) A solution formed by mixing 16.0 mL of 0.000250 M Sr(OH)2 with 89.0 mL of 7.6 x 10-3 M NaOH [OH -] =  M pH =

Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake? [Remember the definition of pH]

By definition, what happens when an acid and base react? 0000 Water is formed. An ionic compound forms. Carbon dioxide is produced. A neutralization reaction occurs. The density of the solution changes. Salt -- always NaCl -- forms.

For each compound, indicate: (a) whether it will undergo dissociation, ionization, or neither in water (b) whether it is a strong, weak, or nonelectrolyte in water (c) whether or not the chemical equation for dissolving the compound in water is correct or incorrect  *Note: For acids, the shorthand version of the equation is shown where the water molecule is not shown. compound equation (a) (b) (c)  HCl  HCl(aq) → H+(aq) + Cl-(aq)        KF  KF(s) → K+(aq) + F-(aq)        MgBr2  MgBr2(s) → Mg2+(aq) + F2(aq)        C6H14  C6H14(l)  → CO2(g) + H2O(l)        HNO2  HNO2(aq) → H+(aq) + NO2-(aq)

What volume (mL) of 0.10 HNO3 is required to neutralize 125 mL of 0.050 M KOH?